The Covetous Headsman (The Saint TV Series)

On a flight to Paris, the Saint meets Valerie North, who is on her way to meet her long-lost brother, only to find on arrival that he has been murdered, for a St. Christopher medal taken from around his neck. Valerie owns an identical medal, which she gives to the Saint. She is then kidnapped by Olivant, a Nazi collaborator in the Second World War, who recognizes that the two medals together are worth a fortune. The Saint has to discover why, as well as saving Valerie from Olivant's clutches.

Origin
This episode was adapted from the short story of the same name from the 1953 book The Saint in Europe.